Fossil fuels
Starter
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BURNING
CAPROCK
CHEMICAL
COAL
ENERGY
FIRE
FOSSILS
FUEL
HEAT
HEAT
LIGHT
OIL
PETROL
REMAINS
SMOKE
| R | H | L | W | F | L | A | O | C |
| A | E | O | E | O | U | R | H | A |
| Y | A | R | R | S | Q | E | T | P |
| G | T | T | I | S | M | M | L | R |
| R | H | E | F | I | J | A | E | O |
| E | G | P | C | L | J | I | L | C |
| N | I | A | I | S | X | N | I | K |
| E | L | E | K | O | M | S | O | J |
| X | S | G | N | I | N | R | U | B |
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